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Subtropical Storm Josephine Forms Off Mid-Atlantic Coast
The storm could bring 50 mph gusts to Nantucket and Martha's Vineyard, while coastal flooding may linger in the Chesapeake Bay through early Friday.
On Wednesday, Subtropical Storm Josephine formed off the United States East Coast as the 10th named storm of the 2026 hurricane season. Located 265 miles south of Nantucket, Massachusetts, the system has maximum sustained winds of 65 mph.
Unlike purely tropical systems, Josephine draws energy from both ocean heat and colliding warm and cold air masses. National Hurricane Center forecasters noted subtropical storms "generally have a less symmetric wind field," with strongest winds extending farther from the center.
Hazardous marine conditions including dangerous surf and rip currents are affecting much of the eastern seaboard. Gale-force wind gusts are possible along the northeastern United States through Thursday, while minor to moderate coastal flooding continues along the Mid-Atlantic coast.
Moving away from the United States, Josephine will remain south of Nova Scotia and Newfoundland and will not make a direct landfall. The storm is forecast to strengthen into a post-tropical cyclone with hurricane-force winds by late Thursday.
Forecasters at the NHC expect the system to "become absorbed" by Monday as it accelerates northeastward. Josephine poses no threat to South Florida, and wind and rain conditions are expected to subside by this weekend.